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YouTube

How to Break PDF Encryption

Black Hat via YouTube

Overview

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Explore techniques for breaking PDF encryption in this 44-minute Black Hat conference talk. Analyze the structure of PDF encryption and learn two novel methods for compromising the confidentiality of encrypted documents. Delve into topics such as PDF crypt filters, document modification, encryption history, CBC gadget attacks, and known plaintext evaluation. Gain insights from security researchers Jens Müller and Fabian Ising as they discuss the vulnerabilities in one of the world's most widely used document formats and propose potential fixes.

Syllabus

Introduction
PDF Encryption
Attack Mode
PDF Structure
PDF Standard
PDF Crypt Filters
Modifying the Document
PDF Encryption History
CBC Gadget Attacks
Known plaintext
Evaluation
Fixing

Taught by

Black Hat

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